tangier web scheduling

Why do I need task scheduling? In Web applications, most tasks are done in a way that prevents users from waiting for a long time. In examples such as Google search, reducing latency is critical to the user experience. One solution to an asynchronous task is to generate a thread (to handle asynchronous tasks) after the user submits it, but it does not solve situations where tasks need to be run repeatedly

If the datascraper software is required for web page capture and content formatting for periodic web page capture and information extraction, You need to configure periodic web page capture scheduling files for datascraper. This is an XML file, the directory stored in the main directory ($ home. in datascraper, the fil

parameter). In Timer.schedule () scheduling, the hourly schedule is set, so if you want to implement a scheduled task every 24 hours, you also need to determine the clock point, the constant C_schedule_hour (12 o'clock, or 0 points). At the same time, to prevent 24 hours of execution, the task is not finished (of course, the general task is not so long), to avoid the second time is scheduled to cause the execution of the conflict, set the current is

delay, long period)Schedules the specified task to start repeating fixed deferred execution from the specified delay.The timer is thread-safe, and this class can be extended to a large number of simultaneous tasks (there are thousands of of them without problems). All of its construction methods start the timer thread. You can call Cancel () to terminate this timer and discard any currently scheduled tasks. Purge () removes all canceled tasks from this timer's task queue. This class does not pr

situation information, departments by functional division, the need for accurate access to the various departments concerned about the summary information, in the form of financial statements provided. Due to the large amount of financial data, the real-time calculation of financial statements is slow, initially consider using the report cache to reduce the burden on the server, but with caching requires a reasonable cache update mechanism. Taking into account the municipal units before the en